Charge forming and injecting device for internal-combustion engines



Nov. 13, 1928.

A." G. REDMOND CHARGE FORMING AND INJECTING DEVICE FOR INTERNALCOMBUSTION ENGINES 7 Filed Mafch 19, 1920 Patented Nov. 13,1928.

I UNITED STATES PATENTTOFFICE.

' ALBERT GREEN annlvroun, or INDIANAPOLIS, INDIANA, ASSIGNQB 'ro MARVELcm- BURETOR COMPANY, or rLIN'r, MICHIGAN, ACORPORATION or INDIANA.

CHARGE FORMING AND INJECTING, DEVICE INTERNAL-COMBUSTIONENGINES.

Application filed March 19, 1920. Serial No. 367,246.

This invention relates to a charge forming and injecting device forinternal combustion engines, the object being to provide a device bymeans of which a very rich mixture of fuel and air can be pumped to thecylinders of the internal combustibn engine and. injected on thecompression stroke in the form of vapor in order-to prevent condensationof the fuel through the ordinary manifold now employed'in connectionwith a carbureter.

Another object of the invention is to-providea charge forming andinjecting device which is so constructed that the charge of fuel iscontrolled bya. suction controlled valve whereby the opening of thevalve. will allow fuel to pass into the pumps and be injected into thecylinders, thereby overcom-- ing the difli'culties now existing incharge forming devices which depend upon the air to lift the fuel fromthe jets and carry it to the cylinders. j

Another and further object of the invention is to provide a device bymeans of which the explosive charge in the form of vapor s sprayed intothe cylinder just before the ignition, thereby preventing pre-igmtion.

-A still further object of the invention'ls to provide a device wherebyeach cylinder in its order of firing will be supplied with an explosivecharge formed of air and fuel so that a perfect combustion willbeobtained.

Other and further objects and advantages of the invention will behereinafter set forth and the novel features thereof defined by theappended claims.

In the'drawings, g Figure 1 is' a vertical'section through a chargeforming and injecting device constructed in accordance with myinvention.

Figure 2 is a section taken on line 22 of Figure 1.

In carrying out my invention I employ afloat or fuel chamber 1 which. isprovided with fuelinlet 2 controlled by needle valve.

3 through the medium of float 4 of the ordinary construction whereby thefuel will be maintained at a predetermined level within the fuelchamber. Formed integral with the fuel chamber 1 is a casing 5-havinganair inlet 6 and a throttle chamber 7 in which is mounted a throttlevalve 8 controlled by a lever 9 in the ordinary manner fromthe-dash ofthemotor vehicle to which the device isattached. Extending from thethrottle chamber is an induction pipe lO corresponding to the inletmanifold and through which air is adapted to be admited to the cylinderthrough the valves in the ordinary manner.

The casing 5 is provided with a valve seat 11 in which is seated a'suction controlled valve 12 which is adapted to be raised off the seatby the suction of the engine in order to allow air to be drawn throughinlet 6 into the chamber 13 and out through the throttle chamber. Saidvalve is held on the seat by spring 14 mounted in a hollow adjustingscrew 15 working in the threaded bore 16 formed on the casing wherebythe tension of the spring can be adjusted. The valve is provided with asleeve 17 in which is arranged a lug 18 adapted to receive a suitableinstrument inserted through adjusting screw 15 for the I purposehereinafter fully described. The adjusting screw 15 carries a plug 19for closing the upper end which can bereadily removed to allow theinstrument to be inserted for rotating the valve. Ar-

gui eway 20 in which the tubular stem 21 of the valve 12 is slidablymounted for guiding the valve in its vertical movement, said tubularportion-communicating with the fuel chamber 1 as clearly shown. Thevalve stem 21 is provided with a threaded bore 22 in which is adjustablymounted the threaded upper end 23 of needle valve 24 which is adapted tobe seated in the valveseat 25 formed in the outlet 26 of the fuelchamber 1 as clearly shown in Figure 1. The valve 24 is provided with areduced portion 27 preferably rectangular .in shape which is slidablymounted in a guide member 28 for ranged within the inlet passage is atubular preventing the valve from turning and by re moving the plug 19and inserting an instrument through the hollow screw 15 and rotating thevalve 12, the needle valve 24 'can'be adjusted in respect to seat 25'for regulating 'ed to be drawn-so as to mix with the fuel.

Extending from the air well or chamber30 is a passage 32 whichcommunicates with a fuel passage 33, The fuel passage 33 is here inshown formed in the integral extension of the fuel chamber l and-has aplurality of versp ng tical fuel passages 34 which communicate .with apluralityl of cylinders-35 mounted on theextensiomt e fuel'passages 34being controlled by check valves 36.

-T-he cylinders 35 herein shown six in number, one for each cylinder ofthe combustion spring 41, said ,plu'nger being herein shown I operatedbycams 42 carriedby shaft 43 extending lengthwise throu h the housingand driven through. the me ium of suitable.

driving mechanism from theengine and so timed that the plungercorresponding-to the particular cylinder will be operated on thecompression stroke so as to in ect a charge of fuelinto the/cylinder aswill be hereinafter fully described. The extension inwhich thepumpcylinders are mounted is provided with a plurality of outlets 44,one for each cylinder, each outlet being controlled by a pressed-checkvalve 45 and having a coupling member 46 from whichextends'a -1 ipe 47extending to each "cylinder of the englue and through which theexplosive charge ormed of fuel and airis forced by the action of thepump so as to inject on the compression stroke a very rich mixture offuel and air in the'form of vaporinto the cylinderbefo'rethe cylinder isfired.

In the drawing cylinders, one for each cylinder of a six-cylinderinternal combustion engine and it is of the engine is running at highspeed. With course understood that where the device is used inconnection with a four-cylinder internal combustion engine only fourcylinders will be employedand when the device is used eight cylinders'will be employed, one pump cy inder for each cylinder of the internalcombustion: engine in order to inject into the cylinder at the start ofthe compression stroke of theengine a'rich mixture offuel,

which, istimed throu h suitable gears by the engine so that the c argewill be injected at the proper time. I have also shown'cams foroperating the plungers of the pumps but it is of course understood thatthese plungers can be'operated by an other means desired and I do notwish to limit myself to the details of construction herein shown as myinvention consists broadly inprovidinga fuel injector for injecting anexplosive charge into the cylinder which iscontrolled by sue tioncontrolled valve which in turn is. co ntrolled by the position of thethrottle when the throttle open the' increased vacuum will allow agreater amount of fuel to pass out of the fuel chamber-into the airchamber and bemixed with air from which it will be I have shown six pumplivered thereto.

drawn by the suctions of the pumps and injected into the cylinders ofthe internal co'm- Q scribed, the air for the char eis drawn in by .thesuction of the engine t rough the inlet valves, which air controlstheposition of the suction controlled valve so as to regulate the amountof fuel delivered to'the pump cylinders and as the fuel in its passageto the pump cylinder is mixed with air, a very rich mixture in the formof vapor is injected into each cylinder of. the internal combustionengine on the start of the compression stroke of the engine.

What I. claim is: 1.'A charge forming and injecting device for internalcombustion engines comprising a fuel chamber having an outlet, an airpassa'gecommunicating with the internal co1nbust1oneng1ne,-a suctioncontrolled valve arranged in said air passage, avalve operated by saidsuction controlled valve for'controlsling the outlet of fuel froxnsaidfuel chamber and a plurality of pump cylinders co'm. municating withsaid outlet passage having outlets corresponding to the cylinders of-theinternal combustion engine, for injecting fuel into the cylinders ofsaid engine.

2. A charge forming and .'n]ecting device for internal combustionengines having a plurality of chambers in communication with therespective cylinders of said engine, means for injecting the, explosivecharge from said chambersinto the cylinders of the engine and meanscontrolled by the suction of the engine for governing the charge de- 3.Acharge forming and injecting device plurality of pump cylinders rovidedwith conduits leadlng to the cylin ers of the engine,- means operated bythe engine for o crating said pumps for injecting fuel intot e cylinderson the compression stroke and means controlled by the suction of theengine for regulating theguantityof fuel delivered to sai pump cyliners.

4. In a charge foflnlng and injecting'device for. internal combustionengines, [the combination with a. reservoir having a valve controlledoutlet, an air passage provided with-a suction controlled valve forcontrolling the first mentioned valve, a plurality of. pump cylinders,passages extending from the outlet of said reservoir to said pump 0linders and means driven by the engine i or operating said pumpcylinders for injecting an explosive charge into the cylinders of theenginevon the compression stroke.

for internal combustion engines having a f in connect on with aneight-cyl nder engine,

5. A charge forming and injecting device for internal combustion en 'neshaving means for in ecting an exp os1ve charge formed of fuel and airinto thecylinders of the-engi ne on the compression stroke thereof andmeans controlled by the suction of the engine for regulating thequantityof fuel delivered'to said injecting means.

6. A charge forming and injecting device for internal combustion enginescomprising a a.fuel reservoir having an outlet, a needle valve forcontrolling the fuel from said reservoir having a suction controlledvalve and a plurality of pump cylinders in communication with said fueloutlet for injecting an explosive charge formed of fuel and air into thecylinders of said engine on the-compression stroke thereof. I

8; A charge forming and injecting device for internal combustion enginescomprising a pluralityof pumps,'means controlled by the suction of theengine for delivering to the cylinders of said pump an explosive chargeformed of fuel and air and means, operated by the engine for operatingsaid pumps for delivering the explosive charge into the cylinders of theengine on the compression stroke thereof.

9. A charge forming and injecting device for internal combustion enginescomprising a casing having an air passage adapted to be connected to theinduction pipe of the-internal combustion engine, said air passage hav-'ing a throttle valve mounted therein, a suction controlled valvemounted in'said air passage, a fuel chamber having an outlet, a valvemounted to control said outlet, said valve having an adjustableconnection with said suction controlled valve, an air chamber incommunication with the outlet of said fuel reservoir, a plurality ofpumpcylinders in communication with said air chamber and a fuel conduitextending from each of said pumps to a cylinder of the internalcombustion engine.

10. The combination with an internal combustion engine provided'with aplurality of cylinders, of a plurality of pumps having fuel conduitscommunicating with the respective.

v cylinders, means operated by the engine for operating the pumps at apredetermined time and means controlled by the suction of the engine forregulating the supply of fuel to said pumps.

11. A charge forming device for internal combustion engines having meansfor vaporizing fuel, a plurality of pumps, means for delivering fuel tosaid pumps, means operated by the engine for driving said pumps forinjecting the fuel delivered thereto into the respective cylinders ofthe engine on the compression stroke of the piston and means controlledby the suction of the engine for controling the amount of fuel deliveredto said pumps. 1

12. The combination with' aninternal combustion engine provided with aplurality of cylinders and having an intake manifold, a casingprovidedwith an air passage connectedto said manifold, said casing beingprovided with a throttle valve, a suction controlled valve for closingsaid passage, a fuel chamber having an outlet, a valve mounted in saidfuel chamber controlling said outlet,

said valve being adjustably connected to said suction controlled valve,an air chamber havinga calibrated openin in communication with theoutlet of saidf u passage in communication with said air chamber,xaplurality of ump cylinders in communication with said el passage, meansdriven by the} engine for operating said pumpsand fuel conduits leadingfrom said pump to the respective cylinder of the engine for delivering acharge offuel and air to the respective cylinder on the compressionstroke of the piston.

13. A charge forming and injecting device for internal combustionengines comprising an injecting device, a device controlled by thesuction of the engine for regulating the supply of -explosive charge tosaid injecting device and means timed with the engine for operating saidinjecting device for delivering the explosive charge to the cylinder ofthe engine on the compression stroke thereof.

14. A charge forming and injecting device for internal combustionengines having, a plurality of pump chambers in communication with therespective cylinders of said engine, said chambers being incommunication with the source of fuel supply, pistons working in saidpump chambers for injecting the explosive charge from said chambers intothe cy inders of the engine and means controlled by the suction of theen ine for-governing the supply of fuel to said 0 ambers.

15. A charge forming and injecting device for internal combustionengines comprising a casing having anair passage adapted to be connectedto the induction pipe of an internal combustion engine, a suctioncontrolled valve mounted in said air passage,' a fuel chamber having anoutlet, a valve mounted to control said outlet having a connection withsaid suction controlled valve, an air chamber in communication with theoutlet of said fuel reservoir, a plurality of pump cylinders incommunication with said air chamber and a fuel conduit extending fromeach of said pumps to a cylinder of the internal combustion enginee1chamber, a fuel] chamber in communication for internal combustion enines comprising an in'ecting device, a pre iminary mixing cham r incommunicatlon with' said injecting device, a device controlled by thesuction of'the engine for regulating the supply of.

fuel to saidpreliminary mixlng chamber and means timed with the engine-f0r.operating said injecting device for delivering the explosive chargeto the cylinders of the engine.

In t imOny whereoi'I hereunto-aflixmy 3 signatur v ALBERT GREE REDMOND.

